Friday morning, appropriately in a tweet, award-winning hacker Charlie Miller announced that he would start a new job Monday working on the security team at Twitter.
Miller is famous for vulnerability research on the Mac and iOS platforms. His most famous exploit allowed an attacker to take control of an iPhone merely by sending it an SMS text message.
Miller's most recent famous hack exploited a vulnerability in NFC support on Android devices. At the Black Hat 2012 conference in Las Vegas he showed on-stage how he could take control of an Android phone by holding a malicious NFC tag in close proximity to it.